ammonium 2,3,4-trimethoxybenzoate | 262586-54-9

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: ammonium 2,3,4-trimethoxybenzoate
• 英文别名: azanium;2,3,4-trimethoxybenzoate
• CAS: 262586-54-9
• 化学式: C₁₀H₁₁O₅*H₄N
• 分子量: 229.233
• InChiKey: KODVMFVYUILHRR-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  0.45
• 重原子数：
  16
• 可旋转键数：
  3
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.3
• 拓扑面积：
  68.8
• 氢给体数：
  1
• 氢受体数：
  5

反应信息

• 作为反应物：
  描述：

  ammonium 2,3,4-trimethoxybenzoate 、 lanthanum(III) nitrate 以 not given 为溶剂， 生成 lanthanum 2,3,4-trimethoxybenzoate
  参考文献：
  名称：

  Ferenc; Bocian; Chudziak, Journal of Thermal Analysis and Calorimetry, 1999, vol. 58, # 3, p. 639 - 646

  摘要：

  DOI：

文献信息

• Thermal, spectral and magnetic behaviour of 2,3,4-trimethoxybenzoates of Mn(II), Co(II), Ni(II) AND Cu(II)
  作者：Wiesława Ferenc、Beata Bocian、J. Sarzyński

  DOI：10.1007/s10973-005-6854-x

  日期：2006.5

  Four new complexes of 2,3,4-trimethoxybenzoic acid anion with manganese(II), cobalt(II), nickel(II) and copper(II) cations were synthesized, analysed and characterized by standard chemical and physical methods. 2,3,4-Trimethoxybenzoates of Mn(II), Co(II), Ni(II) and Cu(II) are polycrystalline compounds with colours typical for M(II) ions. The carboxylate group in the anhydrous complexes of Mn(II), Co(II) and Ni(II) is monodentate and in that of Cu(II) monohydrate is bidentate bridging one. The anhydrous complexes of Mn(II), Co(II) and Ni(II) heated in air to 1273 K are stable up to 505–517 K. Next in the range of 505–1205 K they decompose to the following oxides: Mn3O4, CoO, NiO. The complex of Cu(II) is stable up to 390 K, and next in the range of 390–443 K it loses one molecule of water. The final product of its decomposition is CuO. The solubility in water at 293 K is of the order of 10–3 mol dm–3 for the Mn(II) complex and 10–4 mol dm–3 for Co(II), Ni(II) and Cu(II) complexes. The magnetic moment values of Mn2+, Co2+, Ni2+ and Cu2+ ions in 2,3,4-trimethoxybenzoates experimentally determined in the range of 77–300 K change from 5.64–6.57 μB (for Mn2+), 4.73–5.17 μB (for Co2+), 3.26–3.35 μB (for Ni2+) and 0.27–1.42 μB (for Cu2+). 2,3,4-Trimethoxybenzoates of Mn(II), Co(II) and Ni(II) follow the Curie–Weiss law, whereas that of Cu(II) forms a dimer.

  通过标准化学和物理方法合成、分析和表征了 2,3,4-三甲氧基苯甲酸阴离子与锰 (II)、钴 (II)、镍 (II) 和铜 (II) 阳离子的四种新络合物。 Mn(II)、Co(II)、Ni(II) 和 Cu(II) 的 2,3,4-三甲氧基苯甲酸盐是多晶化合物，具有 M(II) 离子的典型颜色。 Mn(II)、Co(II) 和 Ni(II) 的无水配合物中的羧酸根是单齿的，一水合铜(II) 的羧酸根是双齿桥连的。在空气中加热至 1273 K 的无水 Mn(II)、Co(II) 和 Ni(II) 络合物在 505–517 K 下保持稳定。接下来在 505–1205 K 范围内，它们分解成以下氧化物： Mn3O4 、CoO、NiO。 Cu(II) 络合物在高达 390 K 的温度下保持稳定，接下来在 390-443 K 的范围内它会失去一个水分子。其分解的最终产物是CuO。 293 K 时，Mn(II) 配合物在水中的溶解度约为 10–3 mol dm–3，Co(II)、Ni(II) 和 Cu(II) 配合物在水中的溶解度约为 10–4 mol dm–3 。实验测定 2,3,4-三甲氧基苯甲酸盐中 Mn2+、Co2+、Ni2+ 和 Cu2+ 离子的磁矩值在 77–300 K 范围内变化为 5.64–6.57 μB（对于 Mn2+）、4.73–5.17 μB（对于 Co2+） ，3.26–3.35 μB（对于 Ni2+）和 0.27–1.42 μB（对于 Cu2+）。 Mn(II)、Co(II) 和 Ni(II) 的 2,3,4-三甲氧基苯甲酸酯遵循居里-韦斯定律，而 Cu(II) 则形成二聚体。
• ——
  作者：W. Ferenc、B. Bocian

  DOI：10.1023/a:1010188905767

  日期：——

  The physico-chemical properties and thermal stability in air of light lanthanide 2,3,4-, 2,4,5- and 3,4,5-trimethoxybenzoates were compared and the influence of the position of -OCH3 substituent on their thermal stability was investigated. The complexes of these series are crystalline, hydrated or anhydrous salts with colours typical of Ln(3)+ ions. The carboxylate group is a bidentate, chelating ligand. The thermal stability of 2,3,4-, 2,4,5- and 3,4,5-trimethoxybenzoates of rare earth elements was studied in the temperature range 273-1173 K. The positions of methoxy groups in benzene ring influence the thermal properties of the complexes and their decomposition mechanism. The different thermal properties of the complexes are connected with various influence of inductive and mesomeric effects of -OCH3 substituent on the electron density in benzene ring.